Iron-based mixed powder for powder metallurgy

Abstract

In an iron-based powder, 0.01% to 5.0% by mass of oxide particles having an average size of 0.5 μm or more are contained, whereby the flowability of an iron-based mixed powder is increased and thereby the density of a green compact is increased, and ejection force is greatly reduced after compaction, thereby accomplishing an increase in product quality and a reduction in production cost.

1 . An iron-based mixed powder for powder metallurgy, containing an iron-based powder and 0.01% to 5.0% by mass of particles of an oxide that have an average size of 0.5 μm or more. 
     
     
         2 . The iron-based mixed power for powder metallurgy according to  claim 1 , wherein the oxide contains at least one selected from the group consisting of iron, aluminum, and silicon. 
     
     
         3 . The iron-based mixed powder for powder metallurgy according to  claim 1 , further containing powder for an alloy. 
     
     
         4 . The iron-based mixed powder for powder metallurgy according to  claim 2 , further containing powder for an alloy. 
     
     
         5 . The iron-based mixed powder for powder metallurgy according to  claim 1 , further containing an organic binder. 
     
     
         6 . The iron-based mixed powder for powder metallurgy according to  claim 1 , further containing a free lubricant. 
     
     
         7 . The iron-based mixed powder for powder metallurgy according to  claim 5 , further containing a free lubricant. 
     
     
         8 . The iron-based mixed powder for powder metallurgy according to  claim 2 , further containing an organic binder. 
     
     
         9 . The iron-based mixed powder for powder metallurgy according to  claim 3 , further containing an organic binder. 
     
     
         10 . The iron-based mixed powder for powder metallurgy according to  claim 4 , further containing an organic binder. 
     
     
         11 . The iron-based mixed powder for powder metallurgy according to  claim 2 , further containing a free lubricant. 
     
     
         12 . The iron-based mixed powder for powder metallurgy according to  claim 3 , further containing a free lubricant. 
     
     
         13 . The iron-based mixed powder for powder metallurgy according to  claim 4 , further containing a free lubricant. 
     
     
         14 . The iron-based mixed powder for powder metallurgy according to  claim 8 , further containing a free lubricant. 
     
     
         15 . The iron-based mixed powder for powder metallurgy according to  claim 9 , further containing a free lubricant. 
     
     
         16 . The iron-based mixed powder for powder metallurgy according to  claim 10 , further containing a free lubricant.